Okay as the thorough travel planner I had read a tripadvisor blog from someone who said they walked from their Waikiki hotel to Diamond Head and then to the top and back to hotel. So I thought we would do the same. Haha. Yes when we were told it's not too far by the hotel staff they were also, well.....lying! It is a long, hot, and on very busy streets kind of walk. So when a taxi pulled up after a mile or two from our hotel and offered us a ride, we happily accepted. So glad we did because we still had a long way to go. Anyway, it cost a dollar to hike to the top of DH. There are restrooms at the bottom of the hill and water available to buy. (Don't forget the water.) We hiked without stopping to the top, passing some older, less physically fit folks, and silly young gals who were wearing heels and flip flops. This is physical exercise--not an afternoon shopping so dress appropriately. The views were awesome and made it worth the journey. The run down the hill in a race with my kids was also the best exercise I've had in a long time. My calf muscles were thanking me for the next two days.